code po404 on 2008 Dodge Grand Caravan

changed o2 sensor got advice from other web site.po404 list egr valve.does it need cleaning or replacement

by in Little River, SC on July 03, 2014
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , September 24, 2014
You can clean it. I clean mine 1 time per year for same code.